This Magnavox TV doesn't power on at all. It was very obvious why right when I opened it, the fuse is blown. And it looks like an extremely low quality power board. I'm guessing there are some shorted diodes somewhere and that the fuse would just blow again if replaced. The customer wants the TV back ASAP, so I was just going to do a board swap and replace the 85C caps.

The stock board is a BA17F8F0102 2 and the one I'm looking at online is a BA17F1F0102 5. It looks to be the same type of board with a smaller caps and a nichicon primary instead of HEC... Should it work correctly?

I would at least try the fuse. I had two of these exact boards that were indeed bad but did not have a blown fuse. The one I did get in with a blown fuse had been through a lightning power surge and it was indeed just the fuse. Pretty quick fix.

Both of the boards I replace had very obvious heat damage on them which yours does not have.

One of those that blow out the power MOSFET and related conponents around it, look for shorted Diode in the secondary side or the load which more likely to cause this simple two-transistor switching power supply to fail.